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af32bb9c4f
This update splits old MTP code and new MTP code from Google into two trees, legacy and ffs. Depending on the SDK level, the build system will select the correct version. The reason for separating the versions out are due to older android trees not supporting the updated MTP code from Google. Most MTP code is from Google, with additions needed from implementing the Java functions in C++ for TWRP and FFS. We assume if you are in android-9.0 or above, your kernel has support for FFS over MTP. Verify that your init.rc is mounting the MTP FFS driver to the proper location. Change-Id: I4b107b239bd9bc5699527f9c8c77d9079f264a7e
105 lines
3.4 KiB
C++
105 lines
3.4 KiB
C++
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MTP_DESCRIPTORS_H
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#define MTP_DESCRIPTORS_H
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#include <linux/usb/ch9.h>
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#include <linux/usb/functionfs.h>
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#include <sys/endian.h>
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constexpr char FFS_MTP_EP0[] = "/dev/usb-ffs/mtp/ep0";
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constexpr char FFS_MTP_EP_IN[] = "/dev/usb-ffs/mtp/ep1";
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constexpr char FFS_MTP_EP_OUT[] = "/dev/usb-ffs/mtp/ep2";
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constexpr char FFS_MTP_EP_INTR[] = "/dev/usb-ffs/mtp/ep3";
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constexpr char FFS_PTP_EP0[] = "/dev/usb-ffs/ptp/ep0";
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constexpr char FFS_PTP_EP_IN[] = "/dev/usb-ffs/ptp/ep1";
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constexpr char FFS_PTP_EP_OUT[] = "/dev/usb-ffs/ptp/ep2";
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constexpr char FFS_PTP_EP_INTR[] = "/dev/usb-ffs/ptp/ep3";
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constexpr int MAX_PACKET_SIZE_FS = 64;
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constexpr int MAX_PACKET_SIZE_HS = 512;
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constexpr int MAX_PACKET_SIZE_SS = 1024;
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constexpr int MAX_PACKET_SIZE_EV = 28;
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struct func_desc {
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struct usb_interface_descriptor intf;
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struct usb_endpoint_descriptor_no_audio sink;
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struct usb_endpoint_descriptor_no_audio source;
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struct usb_endpoint_descriptor_no_audio intr;
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} __attribute__((packed));
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struct ss_func_desc {
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struct usb_interface_descriptor intf;
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struct usb_endpoint_descriptor_no_audio sink;
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struct usb_ss_ep_comp_descriptor sink_comp;
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struct usb_endpoint_descriptor_no_audio source;
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struct usb_ss_ep_comp_descriptor source_comp;
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struct usb_endpoint_descriptor_no_audio intr;
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struct usb_ss_ep_comp_descriptor intr_comp;
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} __attribute__((packed));
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struct desc_v1 {
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struct usb_functionfs_descs_head_v1 {
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__le32 magic;
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__le32 length;
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__le32 fs_count;
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__le32 hs_count;
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} __attribute__((packed)) header;
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struct func_desc fs_descs, hs_descs;
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} __attribute__((packed));
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struct desc_v2 {
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struct usb_functionfs_descs_head_v2 header;
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// The rest of the structure depends on the flags in the header.
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__le32 fs_count;
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__le32 hs_count;
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__le32 ss_count;
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__le32 os_count;
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struct func_desc fs_descs, hs_descs;
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struct ss_func_desc ss_descs;
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struct usb_os_desc_header os_header;
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struct usb_ext_compat_desc os_desc;
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} __attribute__((packed));
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// OS descriptor contents should not be changed. See b/64790536.
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static_assert(sizeof(struct desc_v2) == sizeof(usb_functionfs_descs_head_v2) +
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16 + 2 * sizeof(struct func_desc) + sizeof(struct ss_func_desc) +
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sizeof(usb_os_desc_header) + sizeof(usb_ext_compat_desc),
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"Size of mtp descriptor is incorrect!");
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#define STR_INTERFACE "MTP"
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struct functionfs_lang {
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__le16 code;
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char str1[sizeof(STR_INTERFACE)];
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} __attribute__((packed));
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struct functionfs_strings {
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struct usb_functionfs_strings_head header;
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struct functionfs_lang lang0;
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} __attribute__((packed));
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extern const struct desc_v2 mtp_desc_v2;
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extern const struct desc_v2 ptp_desc_v2;
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extern const struct desc_v1 mtp_desc_v1;
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extern const struct desc_v1 ptp_desc_v1;
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extern const struct functionfs_strings mtp_strings;
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bool writeDescriptors(int fd, bool ptp);
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#endif // MTP_DESCRIPTORS_H
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